It's amazing, Derpy looks so carefree and ebullient, just watching those bubbles without a single worry in the world. Great work, and 6-7 hours is a lot of time put in, you were/are obviously very dedicated. The portrait of a muffin adds to the environment and her wandering eyes are hilarious and cute. Aaaand, it GOES ON FOREVER! (Yes, I know I said that before).

The looping quality and the work in general also strangely reminds me of the Hypnotoad, i.e., the one from Futurama, (especially the sound, if you ignore the bangs and stuff), but that's probably just me.